纳米、亚微米标准样板及SPM量值溯源

微电子及纳米技术的发展 ,对纳米、亚微米尺寸计量及仪器的量值溯源的要求越来越高。文中就建立这一量值溯源体系进行探讨 ,包括 :样板的研制、测量及比对、由仪器和测量方法引起差异的分析等 ,表明了建立纳米、亚微米尺寸计量量值溯源体系的重要性     

消失模铸造产品全生命周期管理系统设计

针对铸造企业产品生产过程中普遍存在的生产过程难以控制、产品品质难以量化、产品信息难以追溯等问题,设计了一种铸造产品全生命周期管理系统。该系统建立了以产品模号唯一码为索引的数据库,通过将其与生产过程数据进行绑定,以及基于InteliiJ IEDA开发平台设计的数据采集接口,实现了生产过程数据自动采集;利用组态技术和PLC技术建立了浇注监控系统,通过可视化监控平台实现了对浇注过程的实时监控。目前该系统在消失模铸造企业得到验证,借助该系统,企业实现了对存在质量隐患的生产工序进行优化改进,提升了设计与生产效率,加强了品质管理。     

基于物联网技术和生物传感器技术的 蔬菜质量安全溯源系统研究

目的结合我国目前农药残留问题对蔬菜质量安全的威胁,分析当前溯源体系的发展现状,并提出一套蔬菜质量安全专用溯源系统。方法该系统由具有无线数据通讯功能的农药残留检测设备、检测系统监控平台、溯源信息共享及监管平台组成。农药残留检测设备应用生物传感器技术和嵌入式技术发开,乙酰胆碱酯酶生物传感器作为农药残留检测设备的专用传感器,检测系统监控平台使用虚拟仪器技术开发,通过前台网页专业模块和后台数据库建立溯源信息共享及监管平台。结果本系统集农药残留多通道检测、检测设备监控、检测信息共享、消费者信息反馈功能于一体,使用radio frequency identification(RFID)和quick response(QR)二维条码相结合的溯源模式实现信息的追溯和共享。结论本系统为政府和消费者提供了一个有效的监管和质量追溯平台,可实现对蔬菜市场的规范和高效管理。     

污水处理厂在线监测仪表校准方法初探

在确定工艺运行正常的前提条件下,如果仪表在线监测指标与工艺(或化验室抽检指标)不符合时,污水处理企业需对在线监测仪表进行校准。需介绍了污水处理企业在线监测仪表在线校准的方法。     

化学示踪技术在民用爆炸物品流向监管中的作用

爆炸物品化学示踪技术是由我国自主研发成功的全新成果,其应用方式为将微量示踪剂均匀混合于爆炸物品中,借助每种示踪剂示踪编码的唯一性,为民用爆炸物品建立身份号码,在民爆物品的生产、运输、仓储、使用等各个环节,将民爆物品各有关信息与示踪编码进行绑定。该技术的应用将在民爆物品流向监管中起到多方面的作用,如跟踪记录民爆物品整个生命轨迹、落实责任到位、实现动态监控和预警、追溯民爆物品来源等,从而提升管理措施的实时性、动态性、有效性和工作效率,其首要的特点是实现了民爆物品的本体标识和炸前炸后溯源。     

Tracing manufacturing processes using blockchain-based token compositions

Supply chain traceability is one of the most promising use cases to benefit from characteristics of blockchain, such as decentralization, immutability and transparency, not required to build prior trust relationships among entities. A plethora of supply chain traceability solutions based on blockchain has been proposed recently. However, current systems are limited to tracing simple goods that have not been part of the manufacturing process. We recommend a method that allows for the traceability of manufactured goods, including their components. Products are represented using non-fungible digital tokens that are created on a blockchain for each batch of manufactured products. To create a link between a product and the components that are needed to produce it, we propose “token recipes” that define the amount of tokenized goods required for minting a new token. As input tokens are automatically and transparently consumed when creating a product token, the physical process of producing a new item out of existing components is projected onto the ledger. This ultimately leads to the complete traceability of goods, including the origin of inputs. Evaluating the performance of the system, we show that a prototypical implementation for the Ethereum Virtual Machine (EVM) scales linearly with the amount of the input and goods tracked.     

Portable system for temperature monitoring in all phases of wine production

This paper presents a low-cost and highly versatile temperature-monitoring system applicable to all phases of wine production, from grape cultivation through to delivery of bottled wine to the end customer. Monitoring is performed by a purpose-built electronic system comprising a digital memory that stores temperature data and a ZigBee communication system that transmits it to a Control Centre for processing and display. The system has been tested under laboratory conditions and in real-world operational applications. One of the system’s advantages is that it can be applied to every phase of wine production. Moreover, with minimum modification, other variables of interest (pH, humidity, etc.) could also be monitored and the system could be applied to other similar sectors, such as olive-oil production.     

PCR Detection of Genetically Modified Organisms: A Review

There are two common approaches for the detection of Genetically Modified Organisms (GMOs): DNA based methods, mainly founded on the Polymerase Chain Reaction (PCR), which detect genetically modified DNA sequences, and protein based methods, relying on immune assays (e. g. Enzyme‐Linked Immunosorbent Assay, ELISA). The latter detect and measure levels of proteins expressed by transgenic genes. Official standard tests, yet to come, will be based on these two methodologies. DNA based tests are now preferred for their sensitivity and their capability to detect a wider range of constructs. Protein‐based immune assay tests, although less sensitive, are quicker and require less lab skills. Collaborative study results put in evidence that PCR tests are generally well suited for detecting the presence of GMOs on a qualitative basis (yes/no). Difficulties arise when GMOs have to be quantitatively identified in food ingredients. Real‐Time, or kinetic PCR, points out quantification and interpretation limits when quantification has to be done on a very small total DNA amount. An essential requirement for PCR‐based techniques is the knowledge of the GMO‐specific DNA sequence target. Many labs find it difficult to keep up with the rate at which life science companies are creating new GMOs and the finding of adequate reference standards to be used as positive analytical controls.     

400 Hz电流互感器检定及量值溯源系统

介绍了400Hz电流互感器检定及量值溯源系统的组成、工作原理、不确定度分析及量值溯源问题。该系统可检定0.02级及以下等级的400Hz电流互感器。     

贯彻ISO-10012国际标准加强计量管理工作

学习ＩＳＯ－１００１２国际标准，加强计量管理工作，确保产品质量，提高社会经济效益。